Brett Kelly:
With Tumblr, I don’t need to think about things like scalability or reliability. I don’t need to make sure my caching plugin is up to date and working because they probably pay dudes to make sure their servers stay up. The fact that I get all of this for free was another big mark in Tumblr’s favor.
There are some trade-offs I’m not ready to give up yet, but my list of reasons to stay with WordPress does seem to get a little bit shorter every day.